Jun 9
AR15 223 Caliber Guide | .223 vs 5.56 NATO AR-15 Rifles
Complete guide to AR15 223 caliber for AR-15 rifles. Learn the critical differences between .223 Remington civilian cartridge and 5.56 NATO military chambering, plus what .223 Wylde means for your AR-15. Technically, the AR-15 is a semi-automatic rifle while .223 Remington is the cartridge it fires—most AR-15s chambered in .223 or 5.56 can shoot both cartridges safely.